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Resistance to be connected to galvanometer

1 vote

A moving coil galvanometer has 150 equal divisions. Its current sensitivity is
10 divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In
order that each division reads 1 volt, the resistance in ohms needed to be connected
in series with the coil will be .

In this I just know that the maximum current and voltage it can read before any resistance connected are 15mA and 75mV.
But now how to proceed .

asked Feb 25, 2017 in Physics Problems by koolman (4,286 points)
What is inside the galvanometer? What kind of internal resistance has it got? Can you draw a circuit diagram for it?

1 Answer

1 vote
Best answer

When the current through the galvanometer is 15mA the voltage across it is 75mV. So the internal resistance is...?

Then add a series resistance such that only 75mV of the applied voltage of 150V appears across the internal resistance.

answered Feb 25, 2017 by sammy gerbil (28,466 points)
selected Feb 25, 2017 by koolman